In this photo taken Tuesday, April 14, 2015, immigrant men armed with machetes make their way onto a Durban, South Africa, street during clashes with police and in search of locals that attacked foreign shop owners in the city center. (Photo by Tebogo Letsie/AP Photo)

Anti-immigrant protesters stand outside the Jeppe hostel in Johannesburg, South Africa, Friday, April 17, 2015, where some foreigners have sought refuge. (Photo by Themba Hadebe/AP Photo)

A crowd of anti-immigrant protesters stand on a burned-out car outside the Jeppe hostel in Johannesburg, South Africa, Friday, April 17, 2015, where some foreigners have sought refuge. Several shops and cars owned by foreigners were torched in downtown Johannesburg overnight in continued anti-immigrant attacks. (Photo by Themba Hadebe/AP Photo)

Zulu protesters demonstrate against foreign migrants outside their hostel in the Jeppestown district of Johannesburg on April 17, 2015. (Photo by Marco Longari/AFP Photo)

A police officer takes aim as they search a hostel in Actonville,east of Johannesburg, April 16, 2015. South African police fired rubber bullets and tear gas on Thursday to disperse a crowd of anti-immigrant protesters in an eastern suburb of Johannesburg, the country's biggest commercial city, a Reuters witness said. (Photo by Siphiwe Sibeko/Reuters)

A group of foreign nationals threaten to defend themselves as police get between them and South Africans after a peace march in Durban, April 16, 2015. At least four people have been killed in a wave of anti-immigrant violence that started two weeks ago in Durban, a key port on South Africa's Indian Ocean coast. (Photo by Rogan Ward/Reuters)

An African immigrant runs as a police officer holds a gun to disperse them in Johannesburg, April 17, 2015. South African police fired rubber bullets and a stun grenade on Friday to disperse a gang of African immigrants who had armed themselves with machetes in a run-down district of east Johannesburg, a Reuters photographer said. South Africa has been hit by a wave of violence against African and other immigrants in the last two weeks. The foreigners have complained about a lack of protection and some have started to arm themselves. (Photo by Siphiwe Sibeko/Reuters)

An African immigrant holds a machete before being dispersed by police officers in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

African immigrants carry machetes before being dispersed by police officers in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

A police officer runs while dispersing African immigrants who are carrying machetes in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

Police officers walk past a car that was burnt overnight in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

Police officers fire rubber bullets as they disperse African immigrants who are carrying machetes in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

African immigrants run as they are dispersed by police officers in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

Zimbabweans hold a demonstration against recent anti-immigrant violence in South Africa outside the South African Embassy in Harare, April 17, 2015. South Africa sought diplomatic support from countries across the continent on Friday to defeat the “demon” of anti-immigrant violence in which at least four people have been killed over the past fortnight. (Photo by Philimon Bulawayo/Reuters)

Locals run after trying to rob a foreign motorist in Johannesburg, April 17, 2015. South Africa sought diplomatic support from countries across the continent on Friday to defeat the “demon” of anti-immigrant violence in which at least four people have been killed over the past fortnight. Foreign nationals have complained that the South African police are failing to protect them, raising the prospect of a row between Pretoria and its neighbours, as well as stirring hostility to South Africans working abroad. (Photo by Siphiwe Sibeko/Reuters)

A man looks out of a hostel window as a police officer walks past in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

A local gestures as he holds a stick and a shield outside a hostel during anti-immigrant related violence in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

A local gestures as he holds a stick and a shield outside a hostel during anti-immigrant related violence in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

A foreign woman from Zimbabwe fetches dry clothes from the fence at a camp set up to house those affected by anti-immigrant violence in Chatsworth, north of Durban, April 17, 2015. South Africa sought diplomatic support from countries across the continent on Friday to defeat the “demon” of anti-immigrant violence in which at least four people have been killed over the past fortnight. Foreign nationals have complained that the South African police are failing to protect them, raising the prospect of a row between Pretoria and its neighbours, as well as stirring hostility to South Africans working abroad. (Photo by Rogan Ward/Reuters)

Foreign children play at a camp set up to house those affected by anti-immigrant violence in Chatsworth north of Durban, April 17, 2015. (Photo by Rogan Ward/Reuters)

A local man gestures with a stick outside a hostel during the anti-immigrant violence in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

Locals harass a motorist who was driving past a hostel during the anti-immigrant violence in Johannesburg, April 17, 2015. (Photo by Siphiwe Sibeko/Reuters)

Police officers hold suspects at gun point after they entered mens hostels following xenophobic violence in the area in Actonville, Johannesburg, South Africa, 16 April 2015. Police searched the mens hostels for weapons used by local South African men against foreign African's after five people have been killed during recent xenophobia attacks that started in the South African port city of Durban. (Photo by Kim Ludbrook/EPA)

Police officers advance to enter mens hostels after xenophobic violence in the area overnight forced foreign shop owners to close their shops for fear of attack in Actonville, Johannesburg, South Africa, 16 April 2015. (Photo by Kim Ludbrook/EPA)

South African hostel dwellers demonstrate against foreigners in Johannesburg, Friday, April 17, 2015, after overnight attacks between locals and immigrants in Johannesburg. Several shops and cars were torched overnight in continued anti-immigrant attacks, despite an appeal from President Jacob Zuma to stop the violence. (Photo by Shiraaz Mohamed/AP Photo)

Anti-immigrant protester demonstrate outside the Jeppe hostel in Johannesburg, South Africa, Friday, April 17, 2015, where some foreigners have sought refuge. Several shops and cars owned by foreigners were torched in downtown Johannesburg overnight in continued anti-immigrant attacks. (Photo by Themba Hadebe/AP Photo)

A crowd of anti-immigrant protesters demonstrate outside the Jeppe hostel in Johannesburg, South Africa, Friday, April 17, 2015, where some foreigners have sought refuge. (Photo by Themba Hadebe/AP Photo)

A resident holds up his hands as a South African anti-riot police officer raids the kitchen area of a hostel in Benoni on April 16, 2015 whose local residents are suspected of having protested against foreign-owned shops in the area, pelting with stones the trucks bringing supplies to the shops and forcing them to shut down. South African President Jacob Zuma on April 16 appealed for calm as a wave of anti-immigrant violence spread to Johannesburg amid fears that the country's dire economic troubles could spark widespread unrest. (Photo by Marco Longari/AFP Photo)

A women covered in soot gestures and shouts towards foreign nationals outside the Jeppies Hostles, in the Jeppestown area of Johannesburg, on April 17, 2015 after residence from the Jeppie Hostles, purportedly torched a passing vehicle in the early hours. Twelve people were arrested overnight as anti-foreigner attacks in South Africa spread to parts of downtown Johannesburg, police said. (Photo by Mujahid Safodien/AFP Photo)

A man carries an axe as he walks past a burnt out vehicle near the Jeppies Hostles, where foreign nationals are living, in the Jeppestown area of Johannesburg, on April 17, 2015 after residence from the Jeppie Hostles, purportedly torched the vehicle in the early hours. (Photo by Mujahid Safodien/AFP Photo)

People lok at a burnt-out car after foreign nationals purportedly torched it in the early hours outside the Jeppies Hostles, in the Jeppestown area of Johannesburg, on April 17, 2015. (Photo by Mujahid Safodien/AFP Photo)